20212221210111 has 12 divisors (see below), whose sum is σ = 33366206442192. Its totient is φ = 11549840691456.

The previous prime is 20212221210109. The next prime is 20212221210119. The reversal of 20212221210111 is 11101212221202.

20212221210111 is a `hidden beast` number, since 20 + 212 + 221 + 210 + 1 + 1 + 1 = 666.

It is not a de Polignac number, because 20212221210111 - 2¹ = 20212221210109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20212221210119) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 160414453986 + ... + 160414454111.

It is an arithmetic number, because the mean of its divisors is an integer number (2780517203516).

Almost surely, 2^{20212221210111} is an apocalyptic number.

20212221210111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20212221210111 is a deficient number, since it is larger than the sum of its proper divisors (13153985232081).

20212221210111 is a wasteful number, since it uses less digits than its factorization.

20212221210111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320828908110 (or 320828908107 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 20212221210111 its reverse (11101212221202), we get a palindrome (31313433431313).

The spelling of 20212221210111 in words is "twenty trillion, two hundred twelve billion, two hundred twenty-one million, two hundred ten thousand, one hundred eleven".